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(No Model.)

J. S. LEWIS. STEAMYGENERATOR AND FEED WATER HEATER.

No. 429,574. Patented June 3. 1890 rz z.

I 0 Wazizesses. U

UNITED STATES PATENT OFFICE.

JAMES S. LEWIS, OF KIMBALL, VIRGINIA, ASSIGNOR OF ONE-HALF TO ELLIS L.MILLER, OF SAME PLACE.

STEAM-GENERATOR AND FEED-WATER HEATER.

SPECIFICATION forming part'of-Letters Patent No.'4=29,574, dated June 3,1890. Application filed December 14, 1889 Serial No. 833,737. (Nomodel.)

To all whom it may concern:

Be it known that 1, JAMES S. Lnwrs, a citizen of the United States,residing at Kimball, 1n the county of Page and State of Virginia, haveinvented certain new and useful Improvements in CombinedSteam-Generators and Feedater Heaters; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

My invention relates to feed-water heaters; and 1t consists in certainnovel combinations of parts with a boiler-furnace, the same comprisingin the maina pipe-coil placed above the grate in a boiler-furnace andconnected with a feed-pump at one end and with the boiler below andabove the water-line at the other end, and provided with certain checkand hand valves, this combination being such that the connections withthe boiler can be reversed or otherwise changed, the condition of steamor water in the coil ascertained, the backflow of water to pump orboiler prevented, and a proportionate part of the steam generated by theheater for use before the ma or portion is generated in the boiler, thecombination being also such that the coil is steadied and kept in formwhile under the influences of heat and cold, and its supports may aid inheating the circulating water.

In the accompanying drawings, Figure 1 is a horizontal section of anordinary boiler, taken above the pipe-coil, showing my invention in planor top view. Fig. 2 is a front view in section above and in elevationbelow of said boiler equipped with my invention; and Fig. 3 is a sideelevation of the same from the left-hand side, and Fig. at a sideelevation of the samefrom the right-hand side; and Fig. 5 is atransverse section of a portion of a boiler, boiler-furnace, coil, andtubular coil-support.

The letter A in the drawings represents a boiler; B, grating; C,pipe-coil; D, tubular coil-support.

The boiler A may be of any known construction, the one represented inFig. 1 being of a type preferred for places remote from large cities, inwhich facilities for repair are not aiforded and where boilers of themost simple construction are generally adopted. In the fire-chamber a ofthis boiler, at a suitable distance above the grating B, transversesupports D, of tubular form, are fastened to the inner wall or casing aof the fire-chamber, said casing being provided with openings, as awhereby communication with the waterspace between said inner wall andthe outer wall of the fire-chamber and between the boiler and said tubesis established. On the upper sides of said supports D solid lugs 01 areprovided, between which the longitudinal branches 0, which with endconnections constitute the pipe-coil C, are placed so that they are heldlaterally in position, with only that allowance for play necessary foraccommodating themselves to the expansion and contraction caused bychanges of temperature while the boiler is either operated or is atrest. One termination c of the coil 0 is connected with the pump (notshown) by a pipe E and with the boiler by a branch pipe 6. The pipe E isprovided with a checkvalve 6' between the branch pipe 6 and pump. (Notshown.) .The branch pipe e joins the boiler below the water-line, as

shown, and is provided with a check-valve 6 whereby the back flow ofwater to the boiler is prevented. The other termination c of the coil 0is connected with a feed-conducting pipe F, which joins the boiler atthe same level with the pipe-coil C and at about the middle of itslength. Near thefront of the boiler the pipe F is provided with a branchpipe f, which joins the top port-ion of the boiler, and near this pointis provided witha hand-valve f, whereby to establish or cut offcommunication between the coil 0 and steamroom of the boiler, as will beseen. A testpipe f with a hand-valve f is also provided on the pipe F,whereby the fact whether the pipe-coil O is working satisfactorily maybe determined, as will be hereinafter described. When the boiler is tobe operated, the valve is opened and the valve f closed. The water inthe boiler is thus permitted to enter the pipe-coil O and expel any airtherefrom which may have found its way into the pipecoil before thefilling of the boiler with water. The fire is now started, whereuponsteam is generated in the pipe-coil O, which enters the steam-room ofthe boiler through pipes F f, and in a short time will be of sufficientpower to be used for driving the steam-engine connected with the boiler.In order to start the current of steam in the direction of pipe f, andthus secure a permanent flow of steam to the steam-room of the boiler,the hand-valve f is opened to discharge the water between it and thecoil C,-the steam therein following the water to said valve. The valveis closed as soon as no more water is discharged, and steam escapesinstead. The water in the boiler now becomes gradually heated until thesteam thus generated becomes sufficiently powerful to operate thesteam-engine, when the valve f will be closed and the pump or injectorset to work. The water from the pump flows now through the coil C,whereby it is heated, and through the pipe F into the lower portion ofthe Water-room in the boiler. If by accident the pump or injector shouldbecome inoperative, thereby stopping the current of feed-waterthroughthe coil, the clicking noise of the check-valve e will cease andwarn the operator to open the valve f, and thus allow thequickly-generated steam in the coil to pass into the steam-chamber ofthe boiler until the pressure in both coil and steam-boiler is balanced.The water in the boiler will now open the valve e and fill the coil,which now co-operates with the boiler as a steam-generator. On suchoccasions and whenever the operator has any doubts about the perfectperformance of the pump and coil he will open the valve f to examine thedischarge therefrom, which at the normal working condition will be asolid uniform stream of water, while otherwise steam or steam and waterin successive alternating jets will be discharged. The tube-supports D,while keeping the coil steady, they by being constantly filled withwater assist in.

heating the feed-water, and by water circulating through them theyarerendered capable of resisting more effectually the destructive action ofheat and flame. The supports D might be made solid and serve a usefulpurpose; but it is preferable to make them tubular.

\Vhat I claim is- 1. The combination, with a boiler, of afeed-water-heating horizontal pipe-coil placed above the grate and incontact with the fire thereof, having direct horizontal communicationwith the water-room of the boiler at one end, pump-connection and acheck-valve at the other end, and a hand test-valve between thepipe-coil and its boiler-connection at the same elevation with thepipe-coil, substan-.

tially as described.

2. The combination, with a boiler, of a horizontal feed-water-heatingpipe-coil placed above the boiler-grate in contact with the firethereof, a pump-connection and check-valve, a lower boiler-connection, aconnecting pipe and test-valve beyond said boiler-connection, a pipeconnecting the upper portion of the water-room of a boiler with thereceiving portion of the coil, and a check-valve therein preventingascent of water into the boiler, substantially as described.

3. The combination, with a boiler, of a horizontal feed-water-heatingpipecoil placed near and above the grates, and connected by itsreceiving-end portion with the pump and to the upper portion of thewater-room of the boiler, and with its dischargingeud portion to thewater and high-steam portions of the boiler, and having a pump-watercheck-valve, a boiler check-valve in the upper water-connection, ahand-valve in the steam-connection, and a test-valve below thesteam-connection and beyond the lower water-comma tion, substantially asdescribed.

4. In a boiler, the combination of a waterheating pipe-coil andtransverse supports having lugs d, substantially as described.

5. In a boiler, the combination of a waterheating pipe-coil andtransverse tubular supports D, having lugs d, and having communicationwith the boiler, substantially as described.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

JAMES S. LE\VIS.

Witnesses:

L. G. KIBLER, J. 13. BATMAN.

